Hmbown/CodeWhale · error · anyhow::Error

FIM API error: HTTP

Error message

FIM API error: HTTP {status}: {error_text}

What it means

The FIM (`beta/completions`) HTTP request returned a non-success status. The error body is read with a byte bound, sanitized with provider attribution via `sanitize_http_error_body`, and re-raised with the HTTP status so the upstream cause is directly visible. Raised in `crates/tui/src/client.rs` around line 5133.

Solutions

1. Read the sanitized `error_text` — it names the provider-side cause.
2. Confirm the base URL + provider actually exposes `beta/completions` (a 404 here means no FIM route).
3. Check API key validity and quota if status is 401/403/429.
4. Validate the prompt/suffix and model id in the FIM request.

// Probe availability once at startup
let probe = client.fim_completion(test_req.clone()).await;
let fim_available = !probe.as_ref().map_err(|e| e.to_string()).err().map_or(false, |s| s.contains("HTTP 404"));

match client.fim_completion(req).await {
    Err(e) if e.to_string().contains("FIM API error: HTTP") => {
        if extract_status(&e.to_string()) == 429 { retry_with_backoff(); }
        else { disable_fim_for_session(); }
    }
    other => other,
}

When it happens

Trigger: Any non-2xx response from POST `{base_url}/beta/completions`: unknown/undiscovered `beta/completions` path (404), bad model id, auth failure, quota exhaustion, malformed prompt/suffix payload.

Common situations: Provider endpoints that do not actually expose `beta/completions` (404); wrong base URL configured so the path 404s; API keys without FIM/beta access; rate limits during heavy autocomplete traffic.

Understand the failure class

Background: "API error: {status}" and "HTTP 401/403/404/429/5xx" errors: non-2xx HTTP responses explained — this error's family across 27 libraries.

Related errors

• ${compactRuntimeError(response.status, result)}
• DeepSeek
• detail || ("HTTP " + res.status)
• iLink API failed: HTTP
• Speech synthesis failed: HTTP

AI-assisted analysis of Hmbown/CodeWhale@73e0f67d83 (2026-09-22). Data as JSON: /api/errors/6865824179a3bf86. Report an issue: GitHub.

Appendix: source

Thrown at crates/tui/src/client.rs:5133

        let url = api_url_with_suffix(&self.base_url, "beta/completions", None);
        let model = self.wire_model_for_route(model);
        let max_tokens = max_tokens.min(self.effective_max_output_tokens(&model));
        let body = json!({
            "model": model,
            "prompt": prompt,
            "suffix": suffix,
            "max_tokens": max_tokens,
        });
        let response = self.send_json_with_retry(&url, &body).await?;
        let status = response.status();
        if !status.is_success() {
            let raw_error_text = bounded_error_text(response, ERROR_BODY_MAX_BYTES).await;
            let error_text = sanitize_http_error_body(
                Some(self.api_provider.display_name()),
                status.as_u16(),
                &raw_error_text,
            );
            anyhow::bail!("FIM API error: HTTP {status}: {error_text}");
        }
        let response_text = response
            .text()
            .await
            .context("Failed to read FIM API response body")?;
        let value: serde_json::Value =
            serde_json::from_str(&response_text).context("Failed to parse FIM API response")?;
        let text = value
            .pointer("/choices/0/text")
            .and_then(serde_json::Value::as_str)
            .ok_or_else(|| anyhow::anyhow!("FIM response missing choices[0].text"))?;
        Ok(text.to_string())
    }
}

mod anthropic;
mod chat;
mod deepseek_effort;

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